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/**
* Copyright (c) 2004 - 2010 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Victor Roldan Betancort - initial API and implementation
*/
package org.eclipse.emf.cdo.internal.server.db4o;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.id.CDOIDUtil;
import com.db4o.ObjectContainer;
import com.db4o.ObjectSet;
import com.db4o.query.Query;
/**
* @author Victor Roldan Betancort
*/
public final class QueryUtil
{
public static PrimitiveRevision getLastPrimitiveRevision(ObjectContainer container, int branchId, CDOID id)
{
ObjectSet<?> set = getRevisionById(container, branchId, id);
PrimitiveRevision lastRevision = null;
for (Object value : set)
{
PrimitiveRevision rev = (PrimitiveRevision)value;
if (lastRevision == null)
{
lastRevision = rev;
}
if (rev.getVersion() > lastRevision.getVersion())
{
lastRevision = rev;
}
}
return lastRevision;
}
public static PrimitiveRevision getPrimitiveRevisionByVersion(ObjectContainer container, CDOID id, int branchId,
int version)
{
ObjectSet<?> set = getRevisionById(container, branchId, id);
for (Object value : set)
{
PrimitiveRevision rev = (PrimitiveRevision)value;
if (rev.getVersion() == version)
{
return rev;
}
}
return null;
}
private static ObjectSet<?> getRevisionById(ObjectContainer container, int branchId, CDOID id)
{
Query query = container.query();
query.constrain(PrimitiveRevision.class);
query.descend("id").constrain(CDOIDUtil.getLong(id));
query.descend("branchID").constrain(branchId);
ObjectSet<?> set = query.execute();
return set;
}
public static void removeRevisionFromContainer(ObjectContainer container, int branchId, CDOID id)
{
PrimitiveRevision primitiveRevision = QueryUtil.getLastPrimitiveRevision(container, branchId, id);
if (primitiveRevision != null)
{
container.delete(primitiveRevision);
}
else
{
throw new IllegalArgumentException("Revision with ID " + id + " not found, cannot detach");
}
}
}
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